trojan or not trojan

Hello all I have teamspeak which allow me to speak in flight sim. Since a few days Avast warns a trojan is here! This is named : keypress.dll. I can’t understand because I use teamspeak for two months and haven’t had any warning before. I put it in quarantine area but teamspeak give me a warn beacause keypress.dll is missing. How can I do to allow this dll ? I have no possibility to say to avast ignore this dll ! ??? Thanks for your answers

Please see here: http://forum.avast.com/index.php?topic=11153.0

–lee